Starting April 19, 2018, Primera Air will begin nonstop service between Newark Liberty (EWR) and London Stansted (STN). Round-trip intro fares start at $306, with limited availability during the first week of service.
As with other budget carriers, the baggage allowance for the lowest fares is limited to carry-ons. In this case, carry-ons must not exceed 10kg. Additional baggage and meals cost extra, or there's the option of booking in a different fare class that includes these extras.
Add a $12 credit card fee to the $294 fare seen below. Or, if you prefer, you can avoid this fee by going through the hassle of paying with a bank transfer within 24 hours of booking.
Primera will add additional routes throughout spring 2018, with Newark to Birmingham and Paris both on May 18, Boston/London on May 18, Boston/Paris on June 21, and Boston/Birmingham on June 22.